Gymnasium parallel bar



zy im" Nowvr. 5, 1929. Y F. ALBACH y1,734,664

' l GYMNASI'UM PARALLEL BARA y Filed Augflo. 19284 2 sheets-sheet 1 /N vs /v role s Nov. 5, 1929.

A F. ALBAcH GYMNASIUM PARALLEL BAR Filed Aug. 10. 1928 2 sheets-sneer 2 IJI FRAN/c LAcH,

Patented Nov. 5., 1929 YuNrrEfD si.r es agi-N mata FRANK Ammon, 'or 'sin rtoftrsjirissouan assistanat@ frniafiviniilfiar 'iiiiu'lrifcrm- ING COMPANY, Orsai.' Louis, Mi'ssouai, A conroza'iirioi'i or ivii'sso'ufit *GMNASIUM PARALLELBAR 'fA'pplicaton l'ed'August 10, 1928. Serial-No. 298,796.

This invention relates to that type of nasiu'm exercising apparatus vknown as parallel bars, andmoreespecially to the semi-por- 'table type of the same `which lis the subject Y matter 'of Letters Patent No. 1,111,268, dated September 22, 1914,to the Fred lMedart Manufacturing Co., as assignees of Philip S. Medart, andthis improvement has for its'object:

To provide a structural :formation and i0 combination of parts whereby the comple-` mentarypair ofparallel bars orvrails are capable of adjustment to'and from eachother, and are held to .the required adjustment in "a positive and substantial manner, the con-V Vstruction by means of which such results are attained, also providingat the respective cor. ners of Athe floor baseV for the adjusting mechanism of the series of casters by which aporttable nature is vimparted to tlie apparatus,

zo when required, all as will hereinafter more if vfully appear.

In thel accompanying drawing. j Fig. 1, is-anV end elevation of gymnasium parallel bars, showingv thel --general arrangement of parts in this invention.

lateral adjusting means 'of a parallel Vbar ,and j the aforesaid caster unit in an inactive position. 'Y

Fig. 4, is a detail transverse section on line ,fi-img a .p Fig. 5, is an enlarged detail Aelevationof the locking means for the revoluble crank meinber by whichan adjustment ot' a parallel barV '40 in a vertical plane is effected.

, 'Like reference lnumerals'indicate like parts in the different views.

. The floor-member orbase is of the usual .open center rectangular formation, having lateral'extensionsat its corners `the floor. j As 'in the above mentioned Medart Patent 1 of they apparatus to afford stability against lateral stresses inw actualuse. At its four corners the base 1=is .provided with uprighti standards or 'eXtensions'2 which in connection with adjoining under cavities in the base 1 areadapte'd-tofJ-go provide supportsand enclosures 'for the heieinafter described plurality of caster units.-

At the upper ends eachstandard 21S-formed with an oriticed hinge ilnu'ckle 3 for the pivotal attachment of a tubular housing-orcol-ih" umn .4, whichatv its lower end is formed-with a pair 'of oriiiced hinge knuckles 5, adapted to span the aforesaid-knuckle@ of the standard 2 and be pivotallyconnected therewithV by a pivot pin or pintle 6.

A plurality olf the` tubular 'columns 4-above referred to are provided and are individual to utlieplurality of the aforesaid standard 2.

Each column 4 is adapted'to receive av post or #stem 7 that has iiXed attachment at its-'upper- `end to anV end portion of one of a pair-of yparallel bars 8 usual tothe present type of apparatus. The/lower portion of eachlpost'orfstem 7 vhas sliding movement in its tubular column 4 and is adjustably attached .therein by'any,

usual and suitable fastening means'in the usual operation of setting vrthepair of horizontal bars 4 atzthedesired elevation above No. 1,111,268 each of t-lieaforesaid standards 4 V4is `formed with a vertical extension 2 formed j in' turn with ya verticallyk arranged elongated-slot 9 near its'upper end.

in 'signed' @nach with Said, eiogatalslot 9 in lthe standard, extension 2', thejass'ocia-ted c'oluinn 4 is formed Y with 'journal orilices for the bearinghub's y10, of abentrally arranged eccentric or crank pin '.11 that has operative y',engagement lin the laforesaid ei'iloi'igat'edslot 9ct the e'itension 2"of astandard 2. The arrangement" is such that with'y a turning adj ustment'of said hubs 10 and'fcrank pin`11'pa lateral vadjustnfient 'will' be imparted to Athe tubular column y4,'jto reguljat'e'tliejdis-` tance between the pair of horizontal bars 8 of the apparatus, in that said bars 8 are wholly supported by the series of columns 4. In this improvement one of the bearing hubs 10 aforesaid is formed with a series of concave recesses 12 in an outer portion of its perimeter, and in connection with such construction,.manually actuated means is provided to lock said hub 10 and crank pin 11 v at the required adjustment and prevent any accidental movement therefrom in either direction. Suchlocking means consists of a cylindrical hub 13 having an operating handle 14 at its outer end, and at its inner end a 15 screw threadedshank 15 adapted for engagement in a screw threaded orilice formed in a tubular column 1 in operative relation to aforesaid peripherally notched wearing hub 10 of the cranlt` pin 11, soV

that with a turning movement of said screw threaded shankl in a column 4c, a portion of the circular perimeter of the huh13 will move into engagement in the nearest concave recess 12 ofthe crank pin hub 10 to lock the same j from turning movement in either direction.

The corner caster units heretofore referred to, have the same general construction and arrangement as in the aforesaid Medart- Patent No. 1,111,268, and in detail each caster unit will have a construction as follows:

In a vertical orifice in the lower portion of a standard 2 aforesaid, a tubular bushing 16 is slidingly mounted and at its lower end is formed with an enlarged head 17, one Yside of v.35 which is cut away to provide an abutment flange 18 at the lower end of said hub for the purpose hereinafter set forth.

In the vertical bore of said tubular bushing 16, the upright journal stem 19 of an oifset 40 caster frame 2O is revolubly arranged to permit of the usual swivel movement of the caster frame in a horizontal plane in actual use.

Adjacent to its oiset end the caster frame 20,

carries the usual pair of caster wheels on rollers 21, as shown.

In this invention, a horizontally arranged rock shaft 22 is journalled in an orifice radial to the axis of the tubular bushing 16 of a caster unit, and formed in the lower portion of a standard 2. The outer end of said shaft 22 is provided withan operatingliandle or lever I 28, and at its innerend carries a crank arm 24, adapted for bearing engagement against the upper surface of the aforesaid flange 18 'Y 55 of the hub 17. of the caster bushing 16, and

" so that with said crank arm 24 in its normal position shown in Fig. 3, the caster unit will be raised into an inactive position by an associated lever 25 vand spring 26,v within the un der recess of the base 1. With a quarter turn of' the rock shaft 2v2, the crank arm 24 is i -Y brought into the position shown in Fig. 2,'to

force Vthe caster unit into its active position,

l "S55 supporting the apparaus a distance above the ating hand lever and at its inner end a crank arm for engagement with the aforesaid flange of the tubular bushing to impart a downward adjustment to said bushing 'and the caster unit in relation to the standard and base of the apparatus.

2. In an exercising apparatus of the type described, the combinationof a base having a recessed bottom and a corner standard formed with a vertical journal orifice, a tubular bushing fitting said orifice and having at its lower end an enlarged head formed in turn with a side flange at its lower end, a caster unit mounted in said bushing, a shaft journalled horizontally in the aforesaid standard and having at its outer end an operating hand lever and at its inner end a crank arm for engagement with the flange of the bushing head aforesaid to impart downward adjustment to said bushing and caster unit in relation to the base and standard of the apparatus.

In an exercising apparatus of the type described, the combination of a floor base havev ing` a series of corner standards, tubular columns individual to said standards and adapted to litover the same, each column having pivotal connection at its lower end with its standard, adjusting means between the upper ends of the standardsand the columns, each adjusting means comprising a revoluble hub journalled in a column and having an eccentrically arranged pin, each standard being formed with an elongated slot for operative engagement with an aforesaid eccentricallyV arranged pin, means yfor locking each revoluble hub at an adjusted position witheach locking means comprising a series of concave recesses formed in the perimeterof arevoluble hub, and a cylindrical hub adjustably mounted on a column, and adaptedto have peripheral engagement in a peripheral recess aforesaid of a revoluble hub.

.4. In an exercising apparatus of the type described, the combination of a floor base having a series of corner standards, tubular columns individual to said standards and adapted to fit over the same, each column havl ing pivotal connect-ion at its lower end withitsrstandard, adjusting means between the Y upper ends of the kstandards and the columns,

fear-h adjusting means comprising a revoluble hub j ournalled in a column and having an eccentrically arranged pin, each standardV bef ing formed with an elongated slot for operative engagement With-an aforesaid eccentrically arranged pin, means for locking each revoluble hub at an adjusted position With each locking means comprising a series of concave recesses formed in the perimeter of a re volulole hub, and a cylindrical hub having screw threaded engagement With a column aforesaid, so that in a manual adjustment in one direction said cylindrical hub Will be brought into peripheral engagement With a concave recess of an aforesaid revoluble hub.

In testimony Whereofl hereunto affix my signature.

FRANK ALBACH. 

